Arthur J. Gallagher & Co.
MX ˙ BMV ˙ US3635761097
SecurityMX:AJG / Arthur J. Gallagher & Co.
InstitutionSitrin Capital Management LLC
Latest Disclosed Ownership17,143 shares
Latest Disclosed Value $ 3,712,831
Sitrin Capital Management LLC ownership in AJG / Arthur J. Gallagher & Co.

On April 21, 2026 - Sitrin Capital Management LLC filed a 13F-HR form disclosing ownership of 17,143 shares of Arthur J. Gallagher & Co. (MX:AJG) valued at $3,712,831 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 27, 2026 disclosing 17,143 shares of Arthur J. Gallagher & Co.. This represents a change in shares of 0.00% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-04-21 2026-03-31 13F GALLAGHER ARTHUR J COM 363576109 17,143 0 0.00 3,713 -16.32 1.8607
2026-01-27 2025-12-31 13F GALLAGHER ARTHUR J COM 363576109 17,143 0 0.00 4,436 -16.44 2.1050
2025-10-22 2025-09-30 13F GALLAGHER ARTHUR J COM 363576109 17,143 -59 -0.34 5,310 -3.58 2.5478
2025-07-23 2025-06-30 13F GALLAGHER ARTHUR J COM 363576109 17,202 0 0.00 5,507 -7.28 2.8096
2025-04-29 2025-03-31 13F GALLAGHER ARTHUR J COM 363576109 17,202 0 0.00 5,939 21.63 3.2048
2025-02-05 2024-12-31 13F GALLAGHER ARTHUR J COM 363576109 17,202 -355 -2.02 4,883 -1.17 2.4614
2024-10-28 2024-09-30 13F GALLAGHER ARTHUR J COM 363576109 17,557 6,794 63.12 4,940 77.06 2.4675
2024-07-12 2024-06-30 13F GALLAGHER ARTHUR J COM 363576109 10,763 -71 -0.66 2,791 3.03 1.4833
2024-04-30 2024-03-31 13F GALLAGHER ARTHUR J COM 363576109 10,834 -63 -0.58 2,709 10.53 1.4806
2024-01-25 2023-12-31 13F GALLAGHER ARTHUR J COM 363576109 10,897 0 0.00 2,451 -1.33 1.4285
2023-10-26 2023-09-30 13F GALLAGHER ARTHUR J COM 363576109 10,897 -664 -5.74 2,484 -2.17 1.5513
2023-08-03 2023-06-30 13F GALLAGHER ARTHUR J COM 363576109 11,561 -422 -3.52 2,538 10.73 1.4262
2023-04-25 2023-03-31 13F GALLAGHER ARTHUR J COM 363576109 11,983 -80 -0.66 2,292 0.79 1.3886
2023-01-19 2022-12-31 13F GALLAGHER ARTHUR J COM 363576109 12,063 0 0.00 2,274 10.12 1.4486
2022-10-13 2022-09-30 13F GALLAGHER ARTHUR J COM 363576109 12,063 0 0.00 2,065 4.98 1.3589
2022-07-22 2022-06-30 13F GALLAGHER ARTHUR J COM 363576109 12,063 0 0.00 1,967 -6.60 1.2537
2022-04-19 2022-03-31 13F GALLAGHER ARTHUR J COM 363576109 12,063 0 0.00 2,106 2.88 1.0563
2022-01-18 2021-12-31 13F GALLAGHER ARTHUR J COM 363576109 12,063 0 0.00 2,047 14.17 0.9627
2021-11-05 2021-09-30 13F GALLAGHER ARTHUR J COM 363576109 12,063 0 0.00 1,793 6.09 0.8584
2021-07-22 2021-06-30 13F GALLAGHER ARTHUR J COM 363576109 12,063 0 0.00 1,690 12.29 0.7614
2021-04-29 2021-03-31 13F GALLAGHER ARTHUR J COM 363576109 12,063 0 0.00 1,505 0.87 0.7140
2021-02-02 2020-12-31 13F GALLAGHER ARTHUR J COM 363576109 12,063 -2,283 -15.91 1,492 -2.10 0.7450
2020-10-23 2020-09-30 13F GALLAGHER ARTHUR J COM 363576109 14,346 0 0.00 1,524 8.93 0.8068
2020-08-06 2020-06-30 13F GALLAGHER ARTHUR J COM 363576109 14,346 -33,140 -69.79 1,399 -63.86 0.8335
2020-05-11 2020-03-31 13F GALLAGHER ARTHUR J COM 363576109 47,486 -4,000 -7.77 3,871 -21.05 2.2943
2020-01-14 2019-12-31 13F GALLAGHER ARTHUR J COM 363576109 51,486 0 0.00 4,903 6.31 2.5065
2019-10-22 2019-09-30 13F GALLAGHER ARTHUR J COM 363576109 51,486 0 0.00 4,612 2.26 2.5175
2019-07-17 2019-06-30 13F GALLAGHER ARTHUR J COM 363576109 51,486 0 0.00 4,510 12.16 2.4036
2019-04-11 2019-03-31 13F GALLAGHER ARTHUR J COM 363576109 51,486 0 0.00 4,021 5.96 2.1585
2019-01-22 2018-12-31 13F GALLAGHER ARTHUR J COM 363576109 51,486 0 0.00 3,795 -0.99 2.3156
2018-10-17 2018-09-30 13F GALLAGHER ARTHUR J COM 363576109 51,486 0 0.00 3,833 14.04 2.0600
2018-07-25 2018-06-30 13F GALLAGHER ARTHUR J COM 363576109 51,486 37,140 258.89 3,361 240.87 1.9076
2018-04-17 2018-03-31 13F GALLAGHER ARTHUR J COM 363576109 14,346 0 0.00 986 8.59 0.6358
2018-02-08 2017-12-31 13F GALLAGHER ARTHUR J COM 363576109 14,346 0 0.00 908 2.83 0.5736
2017-10-27 2017-09-30 13F GALLAGHER ARTHUR J COM 363576109 14,346 0 0.00 883 7.55 0.5683
2017-08-07 2017-06-30 13F GALLAGHER ARTHUR J COM 363576109 14,346 0 0.00 821 1.23 0.5566
2017-05-09 2017-03-31 13F GALLAGHER ARTHUR J COM 363576109 14,346 -14,392 -50.08 811 -45.68 0.5832
2017-02-08 2016-12-31 13F GALLAGHER ARTHUR J COM 363576109 28,738 -9,594 -25.03 1,493 -23.44 1.1556
2016-11-08 2016-09-30 13F GALLAGHER ARTHUR J COM 363576109 38,332 -20,228 -34.54 1,950 -30.03 1.5324
2016-08-04 2016-06-30 13F GALLAGHER ARTHUR J COM 363576109 58,560 -183,094 -75.77 2,787 -74.07 2.2397
2016-05-11 2016-03-31 13F GALLAGHER ARTHUR J COM 363576109 241,654 215,582 826.87 10,749 970.62 8.5470
2016-01-26 2015-12-31 13F GALLAGHER ARTHUR J COM 363576109 26,072 26,072 1,004 0.8792
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.